A 35‐GHz high image rejection resistive mixer using a tunable resonator and a narrowband bandpass filter

2020 ◽  
Author(s):  
Jihoon Kim
Keyword(s):  
Bandpass Filter ◽  
Image Rejection ◽  
Tunable Resonator

scholarly journals A Q-Enhanced 3.6 GHz, Tunable, Sixth-Order Bandpass Filter Using 0.18 μm CMOS

VLSI Design ◽  
2007 ◽  
Vol 2007 ◽  
pp. 1-9 ◽  
Author(s):  
Anh Dinh ◽  
Jiandong Ge
Keyword(s):  
High Performance ◽  
Bandpass Filter ◽  
Sixth Order ◽  
Center Frequency ◽  
Voltage Gain ◽  
Image Rejection ◽  
Three Stages ◽  
On Chip ◽  
Tuning Frequency ◽  
Tuning Scheme

An experimental filter was designed to operate at 3.6 GHz using mainstream 0.18 μm CMOS. In the design, the Q-enhancement technique was used to overcome the low-Q characteristics of the CMOS on-chip inductors. A sixth-order bandpass filter with a wide passband and a high image rejection was built by cascading three stages of second-order Q-enhanced filters. A combination of three biquads with offset in center frequency provides wider tuning frequency and bandwidth. This high-performance filter provides a 340 MHz tunable center frequency around 3.6 GHz, an image rejection of 50 dB and a tunable Q from 25 to 50 for a bandwidth adjustment from 95 MHz to 35   MHz. The filter achieves an 18 dB voltage gain while consuming 130 mW of power at 1.8 V DC supply. The chip occupies an area of 900×900μm2 including all the required bonding pads. The design provides a simple architecture to simplify tuning scheme for both frequency and bandwidth for practical use. The tunable ability of the design could be exploited in further study to be used as a channel-select filter in the gigahertz range.

A tunable open ring coupling structure and its application in fully tunable bandpass filter

2019 ◽  
Vol 11 (08) ◽  
pp. 782-786
Author(s):  
Zhonghai Zhang ◽  
Fei Zhao ◽  
Aiting Wu
Keyword(s):  
Bandpass Filter ◽  
Design Procedure ◽  
Tunable Filter ◽  
Operating Frequency ◽  
Coupling Structure ◽  
Open Ring ◽  
Tunable Coupling ◽  
Tunable Resonator ◽  
Good Agreement ◽  
Tunable Bandpass Filter

AbstractThis letter presents a novel tunable coupling structure to simplify the design complexity of the miniaturized fully tunable filter by using open ring and varactors. Based on the proposed novel tunable coupling structure, a fully tunable bandpass filter is implemented with independently tunable operating frequency and bandwidth. The tunable resonator and tunable coupling structure can be easily combined to improve Out-of-band suppression performance. The design procedure of a fully tunable bandpass filter consists of five tunable cavities and tunable coupling rings is also proposed. A prototype of the proposed fully tunable filter is built to verify the design experimentally. Good agreement between simulated and measured results is obtained.

Design of a Dual-Band Bandpass Filter Using Active Inductor Principle

2017 ◽  
Vol 7 (4) ◽  
pp. 342
Author(s):  
Imane Halkhams ◽  
Said Mazer ◽  
Mahmoud Mehdi ◽  
Moulhime El Bekkali ◽  
Wafae El Hamdani
Keyword(s):  
Bandpass Filter ◽  
Dual Band ◽  
Active Inductor

Design of Pseudo-Elliptical Wideband Bandpass Filter Using Stub Loaded Short-Circuited Parallel-Coupled Three-Line Units

2010 ◽  
Vol E93-C (7) ◽  
pp. 1022-1031 ◽  
Author(s):  
Chun-Ping CHEN ◽  
Junya TAKAHASHI ◽  
Zhewang MA ◽  
Tetsuo ANADA ◽  
Jui-Pang HSU
Keyword(s):  
Bandpass Filter

Tunable Resonator Employing Comb-shaped Transmission Line and Semiconductor Switches

2014 ◽  
Vol E97.C (8) ◽  
pp. 795-802 ◽  
Author(s):  
Kunihiro KAWAI ◽  
Daisuke KOIZUMI ◽  
Hiroshi OKAZAKI ◽  
Shoichi NARAHASHI
Keyword(s):  
Transmission Line ◽  
Semiconductor Switches ◽  
Tunable Resonator
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